Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:28:03 2013

Optimize a model with 63279 rows, 62489 columns and 249719 nonzeros
Presolve removed 1491 rows and 0 columns
Presolve time: 0.39s
Presolved: 61788 rows, 62489 columns, 246737 nonzeros
Variable types: 62410 continuous, 79 integer (79 binary)

Root relaxation: objective 8.493309e+04, 12993 iterations, 2.73 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 84933.0928    0    3          - 84933.0928     -      -    3s
H    0     0                    86434.000000 84933.0928  1.74%     -    3s
H    0     0                    85483.000000 84933.0928  0.64%     -    3s
     0     0 84937.6564    0    5 85483.0000 84937.6564  0.64%     -    3s
     0     0 84937.8930    0    5 85483.0000 84937.8930  0.64%     -    4s
H    0     0                    85441.000000 84937.8930  0.59%     -    5s
     0     0 84937.8930    0    3 85441.0000 84937.8930  0.59%     -    8s
     0     0 84937.8930    0    5 85441.0000 84937.8930  0.59%     -    8s
     0     0 84937.8930    0    5 85441.0000 84937.8930  0.59%     -    9s
     0     0 84938.3662    0    5 85441.0000 84938.3662  0.59%     -    9s
     0     2 84956.6148    0    5 85441.0000 84956.6148  0.57%     -   10s
*    8     4               7    85383.000000 85122.9469  0.30%   132   11s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 17 nodes (21257 simplex iterations) in 11.71 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.538300000000e+04, best bound 8.538300000000e+04, gap 0.0%